公开(公告)号：EP3124626A1

公开(公告)日：2017-02-01

申请号：EP15768555.3

申请日：2015-03-23

申请人： JFE Steel Corporation

发明人： NOUCHI Taihei ,  TAKAHASHI Koichi ,  TERUI Koki ,  SATO Michitaka ,  YOSHIOKA Aya

IPC分类号： C21B5/00

CPC分类号： C21B5/06 ,  C21B5/003 ,  C21B2005/005 ,  Y02P10/283

摘要： [TASK]
It is to propose a method of operating an oxygen blast furnace which is capable of lowering the temperature in the combustion zone at the tuyere tip while decreasing an emission amount of CO 2 as compared to the conventional ones.
[SOLUTION]
In a method of operating an oxygen blast furnace by blowing at least pure oxygen from tuyeres to generate blast furnace gas containing a small amount of nitrogen from a furnace top, a temperature of a combustion zone at a tuyere tip is lowered by blowing a tuyere-blowing gas, in which the sum of volume fractions of hydrocarbon and hydrogen is not less than 50%, together with the pure oxygen from the tuyeres.

公开(公告)号：EP3124626B1

公开(公告)日：2018-06-06

申请号：EP15768555.3

申请日：2015-03-23

申请人： JFE Steel Corporation

发明人： NOUCHI Taihei ,  TAKAHASHI Koichi ,  TERUI Koki ,  SATO Michitaka ,  YOSHIOKA Aya

IPC分类号： C21B5/00 ,  C21B5/06

CPC分类号： C21B5/06 ,  C21B5/003 ,  C21B2005/005 ,  Y02P10/283

摘要： [TASK] It is to propose a method of operating an oxygen blast furnace which is capable of lowering the temperature in the combustion zone at the tuyere tip while decreasing an emission amount of CO 2 as compared to the conventional ones. [SOLUTION] In a method of operating an oxygen blast furnace by blowing at least pure oxygen from tuyeres to generate blast furnace gas containing a small amount of nitrogen from a furnace top, a temperature of a combustion zone at a tuyere tip is lowered by blowing a tuyere-blowing gas, in which the sum of volume fractions of hydrocarbon and hydrogen is not less than 50%, together with the pure oxygen from the tuyeres.